What is FQDN (Fully Qualified Domain Name)
FQDN stands for Fully Qualified Domain Name. It is the complete (full) and exact address of a website or server on the internet, including all its components. An FQDN provides a unique networking identity to a device or service within the domain name system (DNS) hierarchy.
Components of an FQDN
Hostname: The specific network name of the server or device. For example, www.
Domain Name: The registered name within a specific top-level domain (TLD). For example, example.
Top-Level Domain (TLD): The suffix or extension that indicates the domain category. Common TLDs include .com, .org, .net, etc. In this example, the TLD is .com.
Example of an FQDN
In the FQDN www.example.com:
www is the hostname.
example is the domain name.
.com is the top-level domain.
The full FQDN is www.example.com which uniquely identifies a specific server (like a web server) on the internet.
Importance of FQDN
Uniqueness: It ensures that each server or device on the internet can be uniquely identified.
DNS Resolution: FQDNs are used by DNS servers to resolve domain names into IP addresses, enabling communication over the internet.
